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

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
brcms_c_get_mimo_2g
brcms_c_get_mimo_5g
brcms_c_country_valid
brcms_world_regd
brcms_default_world_regd
brcms_c_japan_ccode
brcms_c_channel_min_txpower_limits_with_local_constraint
brcms_c_set_country
brcms_c_channel_mgr_attach
brcms_c_channel_mgr_detach
brcms_c_channel_set_chanspec
brcms_c_channel_reg_limits
brcms_c_chspec_malformed
brcms_c_valid_chanspec_ext
brcms_c_valid_chanspec_db
brcms_is_radar_freq
brcms_reg_apply_radar_flags
brcms_reg_apply_beaconing_flags
brcms_reg_notifier
brcms_c_regd_init
   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                 if (li_mimo == &locale_bn) {
 500                         maxpwr20 = QDB(16);
 501                         maxpwr40 = 0;
 502 
 503                         if (chan >= 3 && chan <= 11)
 504                                 maxpwr40 = QDB(16);
 505                 }
 506 
 507                 for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 508                         txpwr->mcs_20_siso[i] = (u8) maxpwr20;
 509                         txpwr->mcs_40_siso[i] = (u8) maxpwr40;
 510                 }
 511         }
 512 
 513         /* Fill in the MCS 0-7 STBC rates */
 514         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 515                 txpwr->mcs_20_stbc[i] = 0;
 516                 txpwr->mcs_40_stbc[i] = 0;
 517         }
 518 
 519         /* Fill in the MCS 8-15 SDM rates */
 520         for (i = 0; i < BRCMS_NUM_RATES_MCS_2_STREAM; i++) {
 521                 txpwr->mcs_20_mimo[i] = (u8) maxpwr20;
 522                 txpwr->mcs_40_mimo[i] = (u8) maxpwr40;
 523         }
 524 
 525         /* Fill in MCS32 */
 526         txpwr->mcs32 = (u8) maxpwr40;
 527 
 528         for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
 529                 if (txpwr->ofdm_40_cdd[i] == 0)
 530                         txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
 531                 if (i == 0) {
 532                         i = i + 1;
 533                         if (txpwr->ofdm_40_cdd[i] == 0)
 534                                 txpwr->ofdm_40_cdd[i] = txpwr->mcs_40_cdd[j];
 535                 }
 536         }
 537 
 538         /*
 539          * Copy the 40 MHZ MCS 0-7 CDD value to the 40 MHZ MCS 0-7 SISO
 540          * value if it wasn't provided explicitly.
 541          */
 542         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 543                 if (txpwr->mcs_40_siso[i] == 0)
 544                         txpwr->mcs_40_siso[i] = txpwr->mcs_40_cdd[i];
 545         }
 546 
 547         for (i = 0, j = 0; i < BRCMS_NUM_RATES_OFDM; i++, j++) {
 548                 if (txpwr->ofdm_40_siso[i] == 0)
 549                         txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
 550                 if (i == 0) {
 551                         i = i + 1;
 552                         if (txpwr->ofdm_40_siso[i] == 0)
 553                                 txpwr->ofdm_40_siso[i] = txpwr->mcs_40_siso[j];
 554                 }
 555         }
 556 
 557         /*
 558          * Copy the 20 and 40 MHz MCS0-7 CDD values to the corresponding
 559          * STBC values if they weren't provided explicitly.
 560          */
 561         for (i = 0; i < BRCMS_NUM_RATES_MCS_1_STREAM; i++) {
 562                 if (txpwr->mcs_20_stbc[i] == 0)
 563                         txpwr->mcs_20_stbc[i] = txpwr->mcs_20_cdd[i];
 564 
 565                 if (txpwr->mcs_40_stbc[i] == 0)
 566                         txpwr->mcs_40_stbc[i] = txpwr->mcs_40_cdd[i];
 567         }
 568 
 569         return;
 570 }
 571 
 572 /*
 573  * Verify the chanspec is using a legal set of parameters, i.e. that the
 574  * chanspec specified a band, bw, ctl_sb and channel and that the
 575  * combination could be legal given any set of circumstances.
 576  * RETURNS: true is the chanspec is malformed, false if it looks good.
 577  */
 578 static bool brcms_c_chspec_malformed(u16 chanspec)
 579 {
 580         /* must be 2G or 5G band */
 581         if (!CHSPEC_IS5G(chanspec) && !CHSPEC_IS2G(chanspec))
 582                 return true;
 583         /* must be 20 or 40 bandwidth */
 584         if (!CHSPEC_IS40(chanspec) && !CHSPEC_IS20(chanspec))
 585                 return true;
 586 
 587         /* 20MHZ b/w must have no ctl sb, 40 must have a ctl sb */
 588         if (CHSPEC_IS20(chanspec)) {
 589                 if (!CHSPEC_SB_NONE(chanspec))
 590                         return true;
 591         } else if (!CHSPEC_SB_UPPER(chanspec) && !CHSPEC_SB_LOWER(chanspec)) {
 592                 return true;
 593         }
 594 
 595         return false;
 596 }
 597 
 598 /*
 599  * Validate the chanspec for this locale, for 40MHZ we need to also
 600  * check that the sidebands are valid 20MZH channels in this locale
 601  * and they are also a legal HT combination
 602  */
 603 static bool
 604 brcms_c_valid_chanspec_ext(struct brcms_cm_info *wlc_cm, u16 chspec)
 605 {
 606         struct brcms_c_info *wlc = wlc_cm->wlc;
 607         u8 channel = CHSPEC_CHANNEL(chspec);
 608 
 609         /* check the chanspec */
 610         if (brcms_c_chspec_malformed(chspec)) {
 611                 brcms_err(wlc->hw->d11core, "wl%d: malformed chanspec 0x%x\n",
 612                           wlc->pub->unit, chspec);
 613                 return false;
 614         }
 615 
 616         if (CHANNEL_BANDUNIT(wlc_cm->wlc, channel) !=
 617             chspec_bandunit(chspec))
 618                 return false;
 619 
 620         return true;
 621 }
 622 
 623 bool brcms_c_valid_chanspec_db(struct brcms_cm_info *wlc_cm, u16 chspec)
 624 {
 625         return brcms_c_valid_chanspec_ext(wlc_cm, chspec);
 626 }
 627 
 628 static bool brcms_is_radar_freq(u16 center_freq)
 629 {
 630         return center_freq >= 5260 && center_freq <= 5700;
 631 }
 632 
 633 static void brcms_reg_apply_radar_flags(struct wiphy *wiphy)
 634 {
 635         struct ieee80211_supported_band *sband;
 636         struct ieee80211_channel *ch;
 637         int i;
 638 
 639         sband = wiphy->bands[NL80211_BAND_5GHZ];
 640         if (!sband)
 641                 return;
 642 
 643         for (i = 0; i < sband->n_channels; i++) {
 644                 ch = &sband->channels[i];
 645 
 646                 if (!brcms_is_radar_freq(ch->center_freq))
 647                         continue;
 648 
 649                 /*
 650                  * All channels in this range should be passive and have
 651                  * DFS enabled.
 652                  */
 653                 if (!(ch->flags & IEEE80211_CHAN_DISABLED))
 654                         ch->flags |= IEEE80211_CHAN_RADAR |
 655                                      IEEE80211_CHAN_NO_IR;
 656         }
 657 }
 658 
 659 static void
 660 brcms_reg_apply_beaconing_flags(struct wiphy *wiphy,
 661                                 enum nl80211_reg_initiator initiator)
 662 {
 663         struct ieee80211_supported_band *sband;
 664         struct ieee80211_channel *ch;
 665         const struct ieee80211_reg_rule *rule;
 666         int band, i;
 667 
 668         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 669                 sband = wiphy->bands[band];
 670                 if (!sband)
 671                         continue;
 672 
 673                 for (i = 0; i < sband->n_channels; i++) {
 674                         ch = &sband->channels[i];
 675 
 676                         if (ch->flags &
 677                             (IEEE80211_CHAN_DISABLED | IEEE80211_CHAN_RADAR))
 678                                 continue;
 679 
 680                         if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
 681                                 rule = freq_reg_info(wiphy,
 682                                                      MHZ_TO_KHZ(ch->center_freq));
 683                                 if (IS_ERR(rule))
 684                                         continue;
 685 
 686                                 if (!(rule->flags & NL80211_RRF_NO_IR))
 687                                         ch->flags &= ~IEEE80211_CHAN_NO_IR;
 688                         } else if (ch->beacon_found) {
 689                                 ch->flags &= ~IEEE80211_CHAN_NO_IR;
 690                         }
 691                 }
 692         }
 693 }
 694 
 695 static void brcms_reg_notifier(struct wiphy *wiphy,
 696                                struct regulatory_request *request)
 697 {
 698         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
 699         struct brcms_info *wl = hw->priv;
 700         struct brcms_c_info *wlc = wl->wlc;
 701         struct ieee80211_supported_band *sband;
 702         struct ieee80211_channel *ch;
 703         int band, i;
 704         bool ch_found = false;
 705 
 706         brcms_reg_apply_radar_flags(wiphy);
 707 
 708         if (request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
 709                 brcms_reg_apply_beaconing_flags(wiphy, request->initiator);
 710 
 711         /* Disable radio if all channels disallowed by regulatory */
 712         for (band = 0; !ch_found && band < NUM_NL80211_BANDS; band++) {
 713                 sband = wiphy->bands[band];
 714                 if (!sband)
 715                         continue;
 716 
 717                 for (i = 0; !ch_found && i < sband->n_channels; i++) {
 718                         ch = &sband->channels[i];
 719 
 720                         if (!(ch->flags & IEEE80211_CHAN_DISABLED))
 721                                 ch_found = true;
 722                 }
 723         }
 724 
 725         if (ch_found) {
 726                 mboolclr(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
 727         } else {
 728                 mboolset(wlc->pub->radio_disabled, WL_RADIO_COUNTRY_DISABLE);
 729                 brcms_err(wlc->hw->d11core,
 730                           "wl%d: %s: no valid channel for \"%s\"\n",
 731                           wlc->pub->unit, __func__, request->alpha2);
 732         }
 733 
 734         if (wlc->pub->_nbands > 1 || wlc->band->bandtype == BRCM_BAND_2G)
 735                 wlc_phy_chanspec_ch14_widefilter_set(wlc->band->pi,
 736                                         brcms_c_japan_ccode(request->alpha2));
 737 }
 738 
 739 void brcms_c_regd_init(struct brcms_c_info *wlc)
 740 {
 741         struct wiphy *wiphy = wlc->wiphy;
 742         const struct brcms_regd *regd = wlc->cmi->world_regd;
 743         struct ieee80211_supported_band *sband;
 744         struct ieee80211_channel *ch;
 745         struct brcms_chanvec sup_chan;
 746         struct brcms_band *band;
 747         int band_idx, i;
 748 
 749         /* Disable any channels not supported by the phy */
 750         for (band_idx = 0; band_idx < wlc->pub->_nbands; band_idx++) {
 751                 band = wlc->bandstate[band_idx];
 752 
 753                 wlc_phy_chanspec_band_validch(band->pi, band->bandtype,
 754                                               &sup_chan);
 755 
 756                 if (band_idx == BAND_2G_INDEX)
 757                         sband = wiphy->bands[NL80211_BAND_2GHZ];
 758                 else
 759                         sband = wiphy->bands[NL80211_BAND_5GHZ];
 760 
 761                 for (i = 0; i < sband->n_channels; i++) {
 762                         ch = &sband->channels[i];
 763                         if (!isset(sup_chan.vec, ch->hw_value))
 764                                 ch->flags |= IEEE80211_CHAN_DISABLED;
 765                 }
 766         }
 767 
 768         wlc->wiphy->reg_notifier = brcms_reg_notifier;
 769         wlc->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 770                                         REGULATORY_STRICT_REG;
 771         wiphy_apply_custom_regulatory(wlc->wiphy, regd->regdomain);
 772         brcms_reg_apply_beaconing_flags(wiphy, NL80211_REGDOM_SET_BY_DRIVER);
 773 }
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/net/wireless/broadcom/brcm80211/brcmsmac/channel.c

DEFINITIONS
