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
  30 /* QDB() macro takes a dB value and converts to a quarter dB value */
  31 #define QDB(n) ((n) * BRCMS_TXPWR_DB_FACTOR)
  32
  33 #define LOCALE_MIMO_IDX_bn              0
  34 #define LOCALE_MIMO_IDX_11n             0
  35
  36 /* max of BAND_5G_PWR_LVLS and 14 for 2.4 GHz */
  37 #define BRCMS_MAXPWR_MIMO_TBL_SIZE      14
  38
  39 /* maxpwr mapping to 5GHz band channels:
  40  * maxpwr[0] - channels [34-48]
  41  * maxpwr[1] - channels [52-60]
  42  * maxpwr[2] - channels [62-64]
  43  * maxpwr[3] - channels [100-140]
  44  * maxpwr[4] - channels [149-165]
  45  */
  46 #define BAND_5G_PWR_LVLS        5       /* 5 power levels for 5G */
  47
  48 #define LC(id)  LOCALE_MIMO_IDX_ ## id
  49
  50 #define LOCALES(mimo2, mimo5) \
  51                 {LC(mimo2), LC(mimo5)}
  52
  53 /* macro to get 5 GHz channel group index for tx power */
  54 #define CHANNEL_POWER_IDX_5G(c) (((c) < 52) ? 0 : \
  55                                  (((c) < 62) ? 1 : \
  56                                  (((c) < 100) ? 2 : \
  57                                  (((c) < 149) ? 3 : 4))))
  58
  59 #define BRCM_2GHZ_2412_2462     REG_RULE(2412-10, 2462+10, 40, 0, 19, 0)
  60 #define BRCM_2GHZ_2467_2472     REG_RULE(2467-10, 2472+10, 20, 0, 19, \
  61                                          NL80211_RRF_PASSIVE_SCAN | \
  62                                          NL80211_RRF_NO_IBSS)
  63
  64 #define BRCM_5GHZ_5180_5240     REG_RULE(5180-10, 5240+10, 40, 0, 21, \
  65                                          NL80211_RRF_PASSIVE_SCAN | \
  66                                          NL80211_RRF_NO_IBSS)
  67 #define BRCM_5GHZ_5260_5320     REG_RULE(5260-10, 5320+10, 40, 0, 21, \
  68                                          NL80211_RRF_PASSIVE_SCAN | \
  69                                          NL80211_RRF_DFS | \
  70                                          NL80211_RRF_NO_IBSS)
  71 #define BRCM_5GHZ_5500_5700     REG_RULE(5500-10, 5700+10, 40, 0, 21, \
  72                                          NL80211_RRF_PASSIVE_SCAN | \
  73                                          NL80211_RRF_DFS | \
  74                                          NL80211_RRF_NO_IBSS)
  75 #define BRCM_5GHZ_5745_5825     REG_RULE(5745-10, 5825+10, 40, 0, 21, \
  76                                          NL80211_RRF_PASSIVE_SCAN | \
  77                                          NL80211_RRF_NO_IBSS)
  78
  79 static const struct ieee80211_regdomain brcms_regdom_x2 = {
  80         .n_reg_rules = 7,
  81         .alpha2 = "X2",
  82         .reg_rules = {
  83                 BRCM_2GHZ_2412_2462,
  84                 BRCM_2GHZ_2467_2472,
  85                 BRCM_5GHZ_5180_5240,
  86                 BRCM_5GHZ_5260_5320,
  87                 BRCM_5GHZ_5500_5700,
  88                 BRCM_5GHZ_5745_5825,
  89         }
  90 };
  91
  92  /* locale per-channel tx power limits for MIMO frames
  93   * maxpwr arrays are index by channel for 2.4 GHz limits, and
  94   * by sub-band for 5 GHz limits using CHANNEL_POWER_IDX_5G(channel)
  95   */
  96 struct locale_mimo_info {
  97         /* tx 20 MHz power limits, qdBm units */
  98         s8 maxpwr20[BRCMS_MAXPWR_MIMO_TBL_SIZE];
  99         /* tx 40 MHz power limits, qdBm units */
 100         s8 maxpwr40[BRCMS_MAXPWR_MIMO_TBL_SIZE];
 101 };
 102
 103 /* Country names and abbreviations with locale defined from ISO 3166 */
 104 struct country_info {
 105         const u8 locale_mimo_2G;        /* 2.4G mimo info */
 106         const u8 locale_mimo_5G;        /* 5G mimo info */
 107 };
 108
 109 struct brcms_regd {
 110         struct country_info country;
 111         const struct ieee80211_regdomain *regdomain;
 112 };
 113
 114 struct brcms_cm_info {
 115         struct brcms_pub *pub;
 116         struct brcms_c_info *wlc;
 117         const struct brcms_regd *world_regd;
 118 };
 119
 120 /*
 121  * MIMO Locale Definitions - 2.4 GHz
 122  */
 123 static const struct locale_mimo_info locale_bn = {
 124         {QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 125          QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 126          QDB(13), QDB(13), QDB(13)},
 127         {0, 0, QDB(13), QDB(13), QDB(13),
 128          QDB(13), QDB(13), QDB(13), QDB(13), QDB(13),
 129          QDB(13), 0, 0},
 130 };
 131
 132 static const struct locale_mimo_info *g_mimo_2g_table[] = {
 133         &locale_bn
 134 };
 135
 136 /*
 137  * MIMO Locale Definitions - 5 GHz
 138  */
 139 static const struct locale_mimo_info locale_11n = {
 140         { /* 12.5 dBm */ 50, 50, 50, QDB(15), QDB(15)},
 141         {QDB(14), QDB(15), QDB(15), QDB(15), QDB(15)},
 142 };
 143
 144 static const struct locale_mimo_info *g_mimo_5g_table[] = {
 145         &locale_11n
 146 };
 147
 148 static const struct brcms_regd cntry_locales[] = {
 149         /* Worldwide RoW 2, must always be at index 0 */
 150         {
 151                 .country = LOCALES(bn, 11n),
 152                 .regdomain = &brcms_regdom_x2,
 153         },
 154 };
 155
 156 static const struct locale_mimo_info *brcms_c_get_mimo_2g(u8 locale_idx)
 157 {
 158         if (locale_idx >= ARRAY_SIZE(g_mimo_2g_table))
 159                 return NULL;
 160
 161         return g_mimo_2g_table[locale_idx];
 162 }
 163
 164 static const struct locale_mimo_info *brcms_c_get_mimo_5g(u8 locale_idx)
 165 {
 166         if (locale_idx >= ARRAY_SIZE(g_mimo_5g_table))
 167                 return NULL;
 168
 169         return g_mimo_5g_table[locale_idx];
 170 }
 171
 172 /*
 173  * Indicates whether the country provided is valid to pass
 174  * to cfg80211 or not.
 175  *
 176  * returns true if valid; false if not.
 177  */
 178 static bool brcms_c_country_valid(const char *ccode)
 179 {
 180         /*
 181          * only allow ascii alpha uppercase for the first 2
 182          * chars.
 183          */
 184         if (!((0x80 & ccode[0]) == 0 && ccode[0] >= 0x41 && ccode[0] <= 0x5A &&
 185               (0x80 & ccode[1]) == 0 && ccode[1] >= 0x41 && ccode[1] <= 0x5A &&
 186               ccode[2] == '\0'))
 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         BCMMSG(wlc->wiphy, "wl%d\n", wlc->pub->unit);
 340
 341         wlc_cm = kzalloc(sizeof(struct brcms_cm_info), GFP_ATOMIC);
 342         if (wlc_cm == NULL)
 343                 return NULL;
 344         wlc_cm->pub = pub;
 345         wlc_cm->wlc = wlc;
 346         wlc->cmi = wlc_cm;
 347
 348         /* store the country code for passing up as a regulatory hint */
 349         wlc_cm->world_regd = brcms_world_regd(ccode, ccode_len);
 350         if (brcms_c_country_valid(ccode))
 351                 strncpy(wlc->pub->srom_ccode, ccode, ccode_len);
 352
 353         /*
 354          * If no custom world domain is found in the SROM, use the
 355          * default "X2" domain.
 356          */
 357         if (!wlc_cm->world_regd) {
 358                 wlc_cm->world_regd = brcms_default_world_regd();
 359                 ccode = wlc_cm->world_regd->regdomain->alpha2;
 360                 ccode_len = BRCM_CNTRY_BUF_SZ - 1;
 361         }
 362
 363         /* save default country for exiting 11d regulatory mode */
 364         strncpy(wlc->country_default, ccode, ccode_len);
 365
 366         /* initialize autocountry_default to driver default */
 367         strncpy(wlc->autocountry_default, ccode, ccode_len);
 368
 369         brcms_c_set_country(wlc_cm, wlc_cm->world_regd);
 370
 371         return wlc_cm;
 372 }
 373
 374 void brcms_c_channel_mgr_detach(struct brcms_cm_info *wlc_cm)
 375 {
 376         kfree(wlc_cm);
 377 }
 378
 379 void
 380 brcms_c_channel_set_chanspec(struct brcms_cm_info *wlc_cm, u16 chanspec,
 381                          u8 local_constraint_qdbm)
 382 {
 383         struct brcms_c_info *wlc = wlc_cm->wlc;
 384         struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel;
 385         struct txpwr_limits txpwr;
 386
 387         brcms_c_channel_reg_limits(wlc_cm, chanspec, &txpwr);
 388
 389         brcms_c_channel_min_txpower_limits_with_local_constraint(
 390                 wlc_cm, &txpwr, local_constraint_qdbm
 391         );
 392
 393         /* set or restore gmode as required by regulatory */
 394         if (ch->flags & IEEE80211_CHAN_NO_OFDM)
 395                 brcms_c_set_gmode(wlc, GMODE_LEGACY_B, false);
 396         else
 397                 brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);
 398
 399         brcms_b_set_chanspec(wlc->hw, chanspec,
 400                               !!(ch->flags & IEEE80211_CHAN_PASSIVE_SCAN),
 401                               &txpwr);
 402 }
 403
 404 void
 405 brcms_c_channel_reg_limits(struct brcms_cm_info *wlc_cm, u16 chanspec,
 406                        struct txpwr_limits *txpwr)
 407 {
 408         struct brcms_c_info *wlc = wlc_cm->wlc;
 409         struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel;
 410         uint i;
 411         uint chan;
 412         int maxpwr;
 413         int delta;
 414         const struct country_info *country;
 415         struct brcms_band *band;
 416         int conducted_max = BRCMS_TXPWR_MAX;
 417         const struct locale_mimo_info *li_mimo;
 418         int maxpwr20, maxpwr40;
 419         int maxpwr_idx;
 420         uint j;
 421
 422         memset(txpwr, 0, sizeof(struct txpwr_limits));
 423
 424         if (WARN_ON(!ch))
 425                 return;
 426
 427         country = &wlc_cm->world_regd->country;
 428
 429         chan = CHSPEC_CHANNEL(chanspec);
 430         band = wlc->bandstate[chspec_bandunit(chanspec)];
 431         li_mimo = (band->bandtype == BRCM_BAND_5G) ?
 432             brcms_c_get_mimo_5g(country->locale_mimo_5G) :
 433             brcms_c_get_mimo_2g(country->locale_mimo_2G);
 434
 435         delta = band->antgain;
 436
 437         if (band->bandtype == BRCM_BAND_2G)
 438                 conducted_max = QDB(22);
 439
 440         maxpwr = QDB(ch->max_power) - delta;
 441         maxpwr = max(maxpwr, 0);
 442         maxpwr = min(maxpwr, conducted_max);
 443
 444         /* CCK txpwr limits for 2.4G band */
 445         if (band->bandtype == BRCM_BAND_2G) {
 446                 for (i = 0; i < BRCMS_NUM_RATES_CCK; i++)
 447                         txpwr->cck[i] = (u8) maxpwr;
 448         }
 449
 450         for (i = 0; i < BRCMS_NUM_RATES_OFDM; i++) {
 451                 txpwr->ofdm[i] = (u8) maxpwr;
 452
 453                 /*
 454                  * OFDM 40 MHz SISO has the same power as the corresponding
 455                  * MCS0-7 rate unless overriden by the locale specific code.
 456                  * We set this value to 0 as a flag (presumably 0 dBm isn't
 457                  * a possibility) and then copy the MCS0-7 value to the 40 MHz
 458                  * value if it wasn't explicitly set.
 459                  */
 460                 txpwr->ofdm_40_siso[i] = 0;
 461
 462                 txpwr->ofdm_cdd[i] = (u8) maxpwr;
 463
 464                 txpwr->ofdm_40_cdd[i] = 0;
 465         }
 466
 467         delta = 0;
 468         if (band->antgain > QDB(6))
 469                 delta = band->antgain - QDB(6); /* Excess over 6 dB */
 470
 471         if (band->bandtype == BRCM_BAND_2G)
 472                 maxpwr_idx = (chan - 1);
 473         else
 474                 maxpwr_idx = CHANNEL_POWER_IDX_5G(chan);
 475
 476         maxpwr20 = li_mimo->maxpwr20[maxpwr_idx];
 477         maxpwr40 = li_mimo->maxpwr40[maxpwr_idx];
 478
 479         maxpwr20 = maxpwr20 - delta;
 480         maxpwr20 = max(maxpwr20, 0);
 481         maxpwr40 = maxpwr40 - delta;
 482         maxpwr40 = max(maxpwr40, 0);
 483
 484         /* Fill in the MCS 0-7 (SISO) rates */
 485         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 486
 487                 /*
 488                  * 20 MHz has the same power as the corresponding OFDM rate
 489                  * unless overriden by the locale specific code.
 490                  */
 491                 txpwr->mcs_20_siso[i] = txpwr->ofdm[i];
 492                 txpwr->mcs_40_siso[i] = 0;
 493         }
 494
 495         /* Fill in the MCS 0-7 CDD rates */
 496         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 497                 txpwr->mcs_20_cdd[i] = (u8) maxpwr20;
 498                 txpwr->mcs_40_cdd[i] = (u8) maxpwr40;
 499         }
 500
 501         /*
 502          * These locales have SISO expressed in the
 503          * table and override CDD later
 504          */
 505         if (li_mimo == &locale_bn) {
 506                 if (li_mimo == &locale_bn) {
 507                         maxpwr20 = QDB(16);
 508                         maxpwr40 = 0;
 509
 510                         if (chan >= 3 && chan <= 11)
 511                                 maxpwr40 = QDB(16);
 512                 }
 513
 514                 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 515                         txpwr->mcs_20_siso[i] = (u8) maxpwr20;
 516                         txpwr->mcs_40_siso[i] = (u8) maxpwr40;
 517                 }
 518         }
 519
 520         /* Fill in the MCS 0-7 STBC rates */
 521         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 522                 txpwr->mcs_20_stbc[i] = 0;
 523                 txpwr->mcs_40_stbc[i] = 0;
 524         }
 525
 526         /* Fill in the MCS 8-15 SDM rates */
 527         for (i = 0; i < BRCMS_NUM_RATES_MCS_2_STREAM; i++) {
 528                 txpwr->mcs_20_mimo[i] = (u8) maxpwr20;
 529                 txpwr->mcs_40_mimo[i] = (u8) maxpwr40;
 530         }
 531
 532         /* Fill in MCS32 */
 533         txpwr->mcs32 = (u8) maxpwr40;
 534
 535         for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
 536                 if (txpwr->ofdm_40_cdd[i] == 0)
 537                         txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
 538                 if (i == 0) {
 539                         i = i + 1;
 540                         if (txpwr->ofdm_40_cdd[i] == 0)
 541                                 txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
 542                 }
 543         }
 544
 545         /*
 546          * Copy the 40 MHZ MCS 0-7 CDD value to the 40 MHZ MCS 0-7 SISO
 547          * value if it wasn't provided explicitly.
 548          */
 549         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 550                 if (txpwr->mcs_40_siso[i] == 0)
 551                         txpwr->mcs_40_siso[i] = txpwr->mcs_40_cdd[i];
 552         }
 553
 554         for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
 555                 if (txpwr->ofdm_40_siso[i] == 0)
 556                         txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
 557                 if (i == 0) {
 558                         i = i + 1;
 559                         if (txpwr->ofdm_40_siso[i] == 0)
 560                                 txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
 561                 }
 562         }
 563
 564         /*
 565          * Copy the 20 and 40 MHz MCS0-7 CDD values to the corresponding
 566          * STBC values if they weren't provided explicitly.
 567          */
 568         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 569                 if (txpwr->mcs_20_stbc[i] == 0)
 570                         txpwr->mcs_20_stbc[i] = txpwr->mcs_20_cdd[i];
 571
 572                 if (txpwr->mcs_40_stbc[i] == 0)
 573                         txpwr->mcs_40_stbc[i] = txpwr->mcs_40_cdd[i];
 574         }
 575
 576         return;
 577 }
 578
 579 /*
 580  * Verify the chanspec is using a legal set of parameters, i.e. that the
 581  * chanspec specified a band, bw, ctl_sb and channel and that the
 582  * combination could be legal given any set of circumstances.
 583  * RETURNS: true is the chanspec is malformed, false if it looks good.
 584  */
 585 static bool brcms_c_chspec_malformed(u16 chanspec)
 586 {
 587         /* must be 2G or 5G band */
 588         if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
 589                 return true;
 590         /* must be 20 or 40 bandwidth */
 591         if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
 592                 return true;
 593
 594         /* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */
 595         if (CHSPEC_IS20(chanspec)) {
 596                 if (!CHSPEC_SB_NONE(chanspec))
 597                         return true;
 598         } else if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) {
 599                 return true;
 600         }
 601
 602         return false;
 603 }
 604
 605 /*
 606  * Validate the chanspec for this locale, for 40MHZ we need to also
 607  * check that the sidebands are valid 20MZH channels in this locale
 608  * and they are also a legal HT combination
 609  */
 610 static bool
 611 brcms_c_valid_chanspec_ext(struct brcms_cm_info *wlc_cm, u16 chspec)
 612 {
 613         struct brcms_c_info *wlc = wlc_cm->wlc;
 614         u8 channel = CHSPEC_CHANNEL(chspec);
 615
 616         /* check the chanspec */
 617         if (brcms_c_chspec_malformed(chspec)) {
 618                 wiphy_err(wlc->wiphy, "wl%d: malformed chanspec 0x%x\n",
 619                         wlc->pub->unit, chspec);
 620                 return false;
 621         }
 622
 623         if (CHANNEL_BANDUNIT(wlc_cm->wlc, channel) !=
 624             chspec_bandunit(chspec))
 625                 return false;
 626
 627         return true;
 628 }
 629
 630 bool brcms_c_valid_chanspec_db(struct brcms_cm_info *wlc_cm, u16 chspec)
 631 {
 632         return brcms_c_valid_chanspec_ext(wlc_cm, chspec);
 633 }
 634
 635 static bool brcms_is_radar_freq(u16 center_freq)
 636 {
 637         return center_freq >= 5260 && center_freq <= 5700;
 638 }
 639
 640 static void brcms_reg_apply_radar_flags(struct wiphy *wiphy)
 641 {
 642         struct ieee80211_supported_band *sband;
 643         struct ieee80211_channel *ch;
 644         int i;
 645
 646         sband = wiphy->bands[IEEE80211_BAND_5GHZ];
 647         if (!sband)
 648                 return;
 649
 650         for (i = 0; i < sband->n_channels; i++) {
 651                 ch = &sband->channels[i];
 652
 653                 if (!brcms_is_radar_freq(ch->center_freq))
 654                         continue;
 655
 656                 /*
 657                  * All channels in this range should be passive and have
 658                  * DFS enabled.
 659                  */
 660                 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
 661                         ch->flags |= IEEE80211_CHAN_RADAR |
 662                                      IEEE80211_CHAN_NO_IBSS |
 663                                      IEEE80211_CHAN_PASSIVE_SCAN;
 664         }
 665 }
 666
 667 static void
 668 brcms_reg_apply_beaconing_flags(struct wiphy *wiphy,
 669                                 enum nl80211_reg_initiator initiator)
 670 {
 671         struct ieee80211_supported_band *sband;
 672         struct ieee80211_channel *ch;
 673         const struct ieee80211_reg_rule *rule;
 674         int band, i, ret;
 675
 676         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 677                 sband = wiphy->bands[band];
 678                 if (!sband)
 679                         continue;
 680
 681                 for (i = 0; i < sband->n_channels; i++) {
 682                         ch = &sband->channels[i];
 683
 684                         if (ch->flags &
 685                             (IEEE80211_CHAN_DISABLED | IEEE80211_CHAN_RADAR))
 686                                 continue;
 687
 688                         if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
 689                                 ret = freq_reg_info(wiphy, ch->center_freq,
 690                                                     0, &rule);
 691                                 if (ret)
 692                                         continue;
 693
 694                                 if (!(rule->flags & NL80211_RRF_NO_IBSS))
 695                                         ch->flags &= ~IEEE80211_CHAN_NO_IBSS;
 696                                 if (!(rule->flags & NL80211_RRF_PASSIVE_SCAN))
 697                                         ch->flags &=
 698                                                 ~IEEE80211_CHAN_PASSIVE_SCAN;
 699                         } else if (ch->beacon_found) {
 700                                 ch->flags &= ~(IEEE80211_CHAN_NO_IBSS |
 701                                                IEEE80211_CHAN_PASSIVE_SCAN);
 702                         }
 703                 }
 704         }
 705 }
 706
 707 static int brcms_reg_notifier(struct wiphy *wiphy,
 708                               struct regulatory_request *request)
 709 {
 710         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 711         struct brcms_info *wl = hw->priv;
 712         struct brcms_c_info *wlc = wl->wlc;
 713         struct ieee80211_supported_band *sband;
 714         struct ieee80211_channel *ch;
 715         int band, i;
 716         bool ch_found = false;
 717
 718         brcms_reg_apply_radar_flags(wiphy);
 719
 720         if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
 721                 brcms_reg_apply_beaconing_flags(wiphy, request->initiator);
 722
 723         /* Disable radio if all channels disallowed by regulatory */
 724         for (band = 0; !ch_found && band < IEEE80211_NUM_BANDS; band++) {
 725                 sband = wiphy->bands[band];
 726                 if (!sband)
 727                         continue;
 728
 729                 for (i = 0; !ch_found && i < sband->n_channels; i++) {
 730                         ch = &sband->channels[i];
 731
 732                         if (!(ch->flags & IEEE80211_CHAN_DISABLED))
 733                                 ch_found = true;
 734                 }
 735         }
 736
 737         if (ch_found) {
 738                 mboolclr(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
 739         } else {
 740                 mboolset(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
 741                 wiphy_err(wlc->wiphy, "wl%d: %s: no valid channel for \"%s\"\n",
 742                           wlc->pub->unit, __func__, request->alpha2);
 743         }
 744
 745         if (wlc->pub->_nbands > 1 || wlc->band->bandtype == BRCM_BAND_2G)
 746                 wlc_phy_chanspec_ch14_widefilter_set(wlc->band->pi,
 747                                         brcms_c_japan_ccode(request->alpha2));
 748
 749         return 0;
 750 }
 751
 752 void brcms_c_regd_init(struct brcms_c_info *wlc)
 753 {
 754         struct wiphy *wiphy = wlc->wiphy;
 755         const struct brcms_regd *regd = wlc->cmi->world_regd;
 756         struct ieee80211_supported_band *sband;
 757         struct ieee80211_channel *ch;
 758         struct brcms_chanvec sup_chan;
 759         struct brcms_band *band;
 760         int band_idx, i;
 761
 762         /* Disable any channels not supported by the phy */
 763         for (band_idx = 0; band_idx < wlc->pub->_nbands; band_idx++) {
 764                 band = wlc->bandstate[band_idx];
 765
 766                 wlc_phy_chanspec_band_validch(band->pi, band->bandtype,
 767                                               &sup_chan);
 768
 769                 if (band_idx == BAND_2G_INDEX)
 770                         sband = wiphy->bands[IEEE80211_BAND_2GHZ];
 771                 else
 772                         sband = wiphy->bands[IEEE80211_BAND_5GHZ];
 773
 774                 for (i = 0; i < sband->n_channels; i++) {
 775                         ch = &sband->channels[i];
 776                         if (!isset(sup_chan.vec, ch->hw_value))
 777                                 ch->flags |= IEEE80211_CHAN_DISABLED;
 778                 }
 779         }
 780
 781         wlc->wiphy->reg_notifier = brcms_reg_notifier;
 782         wlc->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 783                              WIPHY_FLAG_STRICT_REGULATORY;
 784         wiphy_apply_custom_regulatory(wlc->wiphy, regd->regdomain);
 785         brcms_reg_apply_beaconing_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER);
 786 }